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Proceedings Paper

Focal plane arrays: MCT, quantum wells, PtSi
Author(s): Rainer Breiter; Wolfgang A. Cabanski; R. Koch; Werner Rode; Johann Ziegler
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Paper Abstract

The family of two dimensional detection modules at AEG Infrared-Modules GmbH (AIM) based on platinum silicide (PtSi) or mercury cadmium telluride (MCT) focal plane arrays for applications in either the 3..5 micrometer (MWIR) or 8..10 micrometer (LWIR) range was recently extended. Two new MCT devices have been realized in the configurations 384 X 288 elements in a 24 micrometer pitch for mid wave applications and 256 X 256 elements in a 40 micrometer pitch for long wave applications. Further a quantum well infrared photodetector (QWIP) device with 256 X 256 elements for long wave applications was introduced. The QWIP material was developed by the Fraunhofer Institute for Applied Physics (IAF) in Freiburg, Germany. Details of the QWIP chip will be presented in a separate paper. The MCT devices provide extremely fast frame rates like 200 Hz and reach even for very short snapshot integration below 350 microsecond noise equivalent temperature differences (NETD's) below 20 mK for the LWIR modules. The QWIP devices provide an NETD even below 10 mK with excellent homogeneity for a rolling frame integration with 20 ms integration time and 50 Hz frame rate. Besides the thermal resolution given by the NETD, the correctability of the devices is discussed as a second important characteristic for the system design. Miniaturized driving and readout electronics and image processing boards for non uniformity correction were developed for different applications. The electronics provide a standardized exclusively digital interface with 14 bit deep resolution for high resolution excellent correctability and simplified exchangeability of modules. The design concepts of the AIM detector family and the main features of some new selected modules are summarized together with measured performance data in this paper.

Paper Details

Date Published: 26 October 1998
PDF: 16 pages
Proc. SPIE 3436, Infrared Technology and Applications XXIV, (26 October 1998); doi: 10.1117/12.328033
Show Author Affiliations
Rainer Breiter, AEG Infrarot-Module GmbH (Germany)
Wolfgang A. Cabanski, AEG Infrarot-Module GmbH (Germany)
R. Koch, AEG Infrarot-Module GmbH (Germany)
Werner Rode, AEG Infrarot-Module GmbH (Germany)
Johann Ziegler, AEG Infrarot-Module GmbH (Germany)

Published in SPIE Proceedings Vol. 3436:
Infrared Technology and Applications XXIV
Bjorn F. Andresen; Marija Strojnik, Editor(s)

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